<template>
 <div>
 <div class="search">
   <input 
     v-model="keyword"
     class="search-input" 
     type="text" 
     placeholder="输入城市名或拼音">
 </div>
 <div class="search-content" ref="search" v-show="keyword">
   <ul>
     <li 
       v-for="item of list" 
       :key="item.id"
       @click="handleCityClick(item.name)"
       class="search-item border-bottom">
       {{item.name}}
     </li>
     <li class="search-item border-bottom" v-show="hasNoData">
       没有找到匹配数据
     </li>
   </ul>
 </div>
</div> 
</template>

<script>
import { mapMutations } from 'vuex'
import Bscroll from 'better-scroll'
export default{
	name: 'CitySearch',
  props: {
    cities: Object
  },
  data () {
    return {
      keyword: '',
      list: [],
      timer: null
    }
  },
  methods: {
     handleCityClick(city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  watch: {
    keyword () {
      if(this.timer) {
        clearTimeout(this.timer)
      }
      if(!this.keyword) {
        this.list = []
        return
      }
      this.timer = setTimeout( () => {
         const result = []
         for (let i in this.cities) {
          this.cities[i].forEach((value) => {
            if(value.spell.indexOf(this.keyword) > -1 ||
              value.name.indexOf(this.keyword) > -1){
              result.push(value)
            }
          })
         }
         this.list = result
      }, 100)
    }
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.search)
  },
  computed: {
    hasNoData () {
      return !this.list.length
    }
  }
}
</script>

<style lang="stylus" scoped>
  @import '~styles/varibles.styl'
  .search
    height: .72rem
    padding: 0 .1rem
    background: $bgColor
    .search-input
      box-sizing: border-box
      width: 100%
      height: .62rem
      padding: 0 .1rem
      line-height: .62rem
      text-align: center
      border-radius: .06rem
      color: #666
  .search-content
    z-index: 1
    overflow: hidden
    position: absolute
    top: 1.58rem
    left: 0
    right: 0
    bottom: 0
    background: #eee
    .search-item
      line-height: .62rem
      padding-left: .2rem
      background: #fff
      color: #666


</style>